<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {
            display: flex;
            height: 400px;
            width: 600px;
            background-color: pink;
            /* flex-flow: row wrap; */
            flex-flow: column wrap;
        }

        div span {
            width: 200px;
            height: 100px;
            margin: 1px 2px;
            background-color: greenyellow;
        }
    </style>
</head>

<body>
    <div>
        <span>1</span><span>2</span><span>3</span><span>4</span>
        <span>5</span><span>6</span><span>7</span><span>8</span>
    </div>
</body>

</html>